<template>
    <div>
        <!-- 面包屑导航区域 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>数据统计</el-breadcrumb-item>
            <el-breadcrumb-item>数据报表</el-breadcrumb-item>
        </el-breadcrumb>

        <!-- 卡片视图区域 -->
        <el-card>
            <!-- 2. 为 ECharts 准备一个定义了宽高的 DOM -->
            <div id="main" style="width: 750px; height:400px;"></div>
        </el-card>

    </div>
</template>

<script>
//1.导入 echarts
const echarts = require("echarts")
import _ from 'lodash'

export default {
    data() {
        return {
        // 需要合并的数据
        options: {
            title: {
            text: '用户来源'
        },
        tooltip: {
          trigger: 'axis',
          axisPointer: {
            type: 'cross',
            label: {
              backgroundColor: '#E9EEF3'
            }
          }
        },
        grid: {
          left: '3%',
          right: '4%',
          bottom: '3%',
          containLabel: true
        },
        xAxis: [
          {
            boundaryGap: false
          }
        ],
        yAxis: [
          {
            type: 'value'
          }
        ]
      }
    }
    },
    created() {},
    // 此时页面上的元素已经被渲染完毕了
    async mounted() {
        // 3. 基于准备好的dom，初始化echarts实例
        var myChart = echarts.init(document.getElementById('main'))

        const {data:res} = await this.$http.get('reports/type/1')
        if(res.meta.status !== 200) {
            return this.$message.error('获取数据失败！')
        }

        // 4. 准备配置和配置项
        const result = _.merge(res.data, this.options)

        // 5. 展示数据
        myChart.setOption(result)
    },
    methods: {}
}
</script>

<style lang="less" scoped>
</style>